Abstract

Abstract Depletion layer formation and current-voltage characteristics are described for the general semiconductor p- n- p ( n- p- n) structure in which the impurity or defect centre is able to communicate with both sets of transport levels. All possibilities for current lie within the region bounded on one side by the essentially vertical Shockley-Prim punch-through characteristic and on the other side by the square-law Mott-Gurney space-charge-limited characteristic. If the impurity levels lie near the mid-gap position a variety of characteristics within this region can be expected. Representative current-voltage characteristics have been computed and are described for a typical silicon structure.

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